removing an object from list

[glen e. p. ropella]

Jae Chan Oh writes:
 > Hi,
 > In my simulation, I need to remove an arbitrary object from a list.
 > The list is basically the same as pplList in hello-world/v03.
 > 
 > Currently, I'm trying to send remove message to pplList in "step" method
 > in Person.m.
 >   i.e. something like: [pplPresent remove: self]; is done.
 > 
 >        where pplPresent is just another head to the list pplList.
 > 
 > But:
 > First, I'm not quite sure that this is the correct way to call remove nor
 > I'm not it is the best way. I think calling remove from pplModelSwarm.m
 > would make things complicated since I would have traverse the list.
 > 
 > Currently, I'm getting "core dump" on the above call to the list.

This is a known problem.  Please see:

http://www.santafe.edu/projects/swarm/archive/list-archive.9610/0074.html

This is a basic tutorial on how to remove objects from the world.

Hope this helps.

glen